Selected physical properties of liquid biofuels

Trávníček, Petr; Valach, Michal; Hlaváčová, Zuzana; Mareček, Ján; Vítěz, Tomáš; Junga, Petr

doi:10.17221/14/2013-rae

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Yamane et al (2001), Boshui et al (2010), and Pelegrini et al (2017) presented general oil, bio-oil, fuel and biofuel characteristics and their influence on thermal and rheological properties. Selected mechanical properties of pellets and biofuels were examined by Kubík and Kažimírová (2015), while rheological properties, such as kinematic and dynamic viscosity, were measured by Trávníček et al (2013). Kosiba et al (2016) investigated the rheological profiles and degradations of blends of new and used motor oils, while Kumbár et al (2015) described the physical and mechanical properties of bioethanol and gasoline blends.…”

Section: Introductionmentioning

confidence: 99%

Selected physical properties of various diesel blends

Hlaváčová¹,

Božíková²,

Hlaváč³

et al. 2018

International Agrophysics

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A b s t r a c t. The quality determination of biofuels requires identifying the chemical and physical parameters. The key physical parameters are rheological, thermal and electrical properties. In our study, we investigated samples of diesel blends with rapeseed methyl esters content in the range from 3 to 100%. In these, we measured basic thermophysical properties, including thermal conductivity and thermal diffusivity, using two different transient methods -the hot-wire method and the dynamic plane source. Every thermophysical parameter was measured 100 times using both methods for all samples. Dynamic viscosity was measured during the heating process under the temperature range 20-80°C. A digital rotational viscometer (Brookfield DV 2T) was used for dynamic viscosity detection. Electrical conductivity was measured using digital conductivity meter (Model 1152) in a temperature range from -5 to 30°C. The highest values of thermal parameters were reached in the diesel sample with the highest biofuel content. The dynamic viscosity of samples increased with higher concentration of bio-component rapeseed methyl esters. The electrical conductivity of blends also increased with rapeseed methyl esters content.K e y w o r d s: diesel blends, rapeseed methyl ester, thermophysical, rheological and electrical properties INTRODUCTION

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Section: Introductionmentioning

confidence: 99%

Selected physical properties of various diesel blends

Hlaváčová¹,

Božíková²,

Hlaváč³

et al. 2018

International Agrophysics

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Temperature Dependence of Density and Viscosity of Biobutanol-Gasoline Blends

et al. 2021

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Butanol seems to be an eligible fuel for compensating for the increasing fuel consumption. Biobutanol could be produced from local sources in the place of use. Its properties show similar results to gasoline, so biobutanol could be added as a biocomponent into fuels. Important properties, in the case of blending biobutanol into gasoline, are its fluid properties and their dependence on the temperature. Therefore, in this paper, the volumetric mass density and viscosity of the selected ratios between biobutanol and gasoline (0, 5, 10, 85, 100 vol.%) were tested over the temperature range from −10 °C up to 40 °C. Gasolines with a 95 Research Octane Number (RON 95) and with a 98 Research Octane Number (RON 98) were used. It was observed that as the temperature increased, the viscosity and volumetric mass density of the samples decreased nonlinearly. Four mathematical models were used for modelling the viscosity. The accuracy of models was evaluated and compared according to the coefficient of determination R2 and sum of squared estimate of errors (SSE). The results show that blends with 5 vol.% and 10 vol.% of biobutanol promise very similar fluid properties to pure gasoline. In contrast, a blend with 85 vol.% of biobutanol shows different fluid properties from gasoline, especially in negative temperatures, a lot. For practical applications, mathematical polynomial multivariate models were created. Using these models, three-dimensional graphs were constructed.

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Selected physical properties of liquid biofuels

Cited by 2 publications

References 15 publications

Selected physical properties of various diesel blends

Selected physical properties of various diesel blends

Temperature Dependence of Density and Viscosity of Biobutanol-Gasoline Blends

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